Peach is definitely a great character to practice your item game with since turnips don't backfire.
I meant to say you have a lot more options from a bomb approach than a boomerang approach because items have inherently quadratic uses. The reason to lay bombs is to either save yourself pluck time, create an item bait trap, or use it as a method of on stage control with other tools. I would ask Hylian about other Bomb Tricks since I some but I use a more even blend of all 3 projectiles for my trap/pressure oriented zoning play style while he uses a lot more bomb pressure and mix-ups for a more rushdown oriented play style.
I play a more pressuring play style, myself, but I use the boomerang for most of it as opposed to the bombs (mostly in part because I can't use them as well as I need to). Personally, I like a dashing attack into an up tilt into Bair into 'Rang into Nair/Bair or something like that, but the Boomerang gets peppered in a lot.
On that note, I'd
loooooooove it if Link's Bair turned him around after use so that you could nail somebody with the 'rang and continue on.
I really can't say on why you're having trouble with that outside of not using it much. I C-stick my directional aerials to make it easier to SHFFL so I don't have too much trouble with the L-Cancel unless my hands are cold. (Raynaud's Phenomenon)
Hylian would be better to ask since he is a much more experienced player than I am with Link and he also has access to information I don't have.
I started using the C-Stick a long time back, it's definitely better because you don't accidentally fast fall or move out of what you're trying to do. And I get the same thing going on when I'm cold, I just can't play right.
I'll have to start playing a little Peach in my downtime to pick up some glide tossing. It's a skill that I really just don't have, and would like to take advantage of.
I have no problem L-cancelling any of his moves, beats me.
It's just his U-Air, for some really, really weird reason. I do it on D-airs, B-airs, and occasionally a N-air (is there a
huge benefit to that, I feel like the Nair doesn't have much ending or landing lag at all), but I tend to just whiff the timing on the U-Air with Link.